get most stuff working again, by upgrading to newer esp-hal version

this involved adding a lot of code from the develop branch step by step
there are still some bugs, but at least i can get into the web interface
and configure stuff again \o/ … measuring and pumping is working as well

rust/src/webserver/get_static.rs

@@ -1,6 +1,6 @@
 use crate::fat_error::FatError;
 use edge_http::io::server::Connection;
-use embedded_io_async::{Read, Write};
+use edge_nal::io::{Read, Write};
 
 pub(crate) async fn serve_favicon<T, const N: usize>(
     conn: &mut Connection<'_, T, { N }>,